phreaking Syllabification: (phreak·ing)Pronunciation: /ˈfrēkiNG/Definition of phreaking noun informal, chiefly North American the action of hacking into telecommunications systems, especially to obtain free calls. Derivatives phreak noun phreakerPronunciation: /ˈfrēkər/ noun Origin: 1970s: alteration of freaking (see freak). The change from f- to ph- was due to association with phone1phreaking in other Oxford dictionaries Definition of phreaking in the British & World English dictionary